JPS56101791A - Light beam scanning device - Google Patents

Light beam scanning device

Info

Publication number
JPS56101791A
JPS56101791A JP420780A JP420780A JPS56101791A JP S56101791 A JPS56101791 A JP S56101791A JP 420780 A JP420780 A JP 420780A JP 420780 A JP420780 A JP 420780A JP S56101791 A JPS56101791 A JP S56101791A
Authority
JP
Japan
Prior art keywords
semiconductor laser
scanning
scanned surface
laser
change
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP420780A
Other languages
Japanese (ja)
Other versions
JPS6237825B2 (en
Inventor
Michiharu Abe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP420780A priority Critical patent/JPS56101791A/en
Publication of JPS56101791A publication Critical patent/JPS56101791A/en
Publication of JPS6237825B2 publication Critical patent/JPS6237825B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/12—Scanning systems using multifaceted mirrors
    • G02B26/127—Adaptive control of the scanning light beam, e.g. using the feedback from one or more detectors

Abstract

PURPOSE:To detect the passing time of a laser beam scanning on a scanned surface securely, accurately and economically by reflecting a laser beam oscillated from a semiconductor laser with a reflecting mirror disposed on said scanned surface and detecting a returned beam with a detector. CONSTITUTION:A semiconductor laser 21 is excited by a semiconductor exciting circuit 22 and a laser beam 23 is oscillated and outputted. A scanning beam 23b that passed a collimater lens 24, a rotating polyhedron mirror 25 and a condenser lens 26 scans on a scanned surface 27. On the other hand, a reflecting mirror 29 is disposed near a point to start the scanning of said scanned surface and a laser beam reached said reflecting mirror is refleted and returned to said semiconductor laser, then a change in the output of said semiconductor laser or a change in an exciting current is caused by the self coupling effect of said semiconductor laser receiving the returning beam, and by detecting this change with a light detector 30, the passing time of said scanning beam can be found accurately and securely with the low cost device.
JP420780A 1980-01-18 1980-01-18 Light beam scanning device Granted JPS56101791A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP420780A JPS56101791A (en) 1980-01-18 1980-01-18 Light beam scanning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP420780A JPS56101791A (en) 1980-01-18 1980-01-18 Light beam scanning device

Publications (2)

Publication Number Publication Date
JPS56101791A true JPS56101791A (en) 1981-08-14
JPS6237825B2 JPS6237825B2 (en) 1987-08-14

Family

ID=11578187

Family Applications (1)

Application Number Title Priority Date Filing Date
JP420780A Granted JPS56101791A (en) 1980-01-18 1980-01-18 Light beam scanning device

Country Status (1)

Country Link
JP (1) JPS56101791A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849980A (en) * 1986-12-29 1989-07-18 Fuji Photo Film Co., Ltd. Laser beam recording method and apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849980A (en) * 1986-12-29 1989-07-18 Fuji Photo Film Co., Ltd. Laser beam recording method and apparatus

Also Published As

Publication number Publication date
JPS6237825B2 (en) 1987-08-14

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